GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Impala 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Engine Control Module Programming and Setup

The following service procedures require either a programming or a setup event performed for a complete repair.

ECM Replacement

If the engine control module (ECM) is replaced, the following procedures must be performed:

  1. ECM Reprogramming--Refer to Service Programming System (SPS).
  2. The CKP System Variation Learn--Refer to Crankshaft Position System Variation Learn for the 3.5L engine, Crankshaft Position System Variation Learn for the 3.9L engine, Crankshaft Position System Variation Learn for the 5.3L engine.
  3. The Throttle Learn procedure--Refer to Throttle Learn.
  4. Fuel Composition Diagnosis--Refer to Fuel Composition Diagnosis for the 3.5L (LZE) engine or Fuel Composition Diagnosis for the 3.9L (LZG) engine.
  5. Engine Oil Life Remaining--When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
  6. Transmission Fluid Life Remaining--When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
  7. Theft Deterrent--Refer to Immobilizer System Component Programming.

ECM Reprogramming
    • If the ECM needs to be reprogrammed, refer to Service Programming System (SPS).
    • Engine Oil Life Remaining--When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was reprogrammed.

       Important: After programming, perform the following to avoid future misdiagnosis:

    • Turn the ignition OFF for 30 seconds.
    • Turn the ignition ON with the engine OFF.
    • Use the scan tool in order to retrieve history DTCs from all modules.
    • Clear all history DTCs.

Setup for Component Replacement

The replacement of some components will require a setup procedure for complete repair.

If any of the following components are replaced, the CKP Variation Learn Procedure must be performed. Refer to Crankshaft Position System Variation Learn for the 3.5L engine, Crankshaft Position System Variation Learn for the 3.9L engine, Crankshaft Position System Variation Learn for the 5.3L engine.

    • Engine replacement
    • Any engine repair that disturbs the CKP sensor or its relationship with the crankshaft reluctor wheel
    • CKP sensor
       ⇒If the throttle body is replaced, a Throttle Learn procedure must be performed. Refer to Throttle Learn.